Dark denim button up shirt dress size medium

Drama Gold button up shirt dress. Dark wash denim. Orange contrast stitching. 65% cotton. 32% polyester. 3% spandex. Size medium. It is approximately 19 inches pit to pit and 17 inches at waist laying flat. It does not have a lot of stretch. While I can't be certain, I think it will fit a 10-12. I added a picture with a Ralph Lauren size 10 dress on top of it. It is slightly wider on the sides and about the same length. Missing one lower button.